How to overclock with below config?

MB: Asus Commando P5B
CPU: Intel Q9650 Core2 Quad
HDD:  7200 WD160Gb
Ram: Kingston 800Mhz DDRII 2Gb X2
Samsung 800Mhz DDRII 1Gb X1
Power: Antel Neo Power 550W
Please advise how to overclock with this config?